2 * Driver for the SWIM3 (Super Woz Integrated Machine 3)
3 * floppy controller found on Power Macintoshes.
5 * Copyright (C) 1996 Paul Mackerras.
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
19 #include <linux/stddef.h>
20 #include <linux/kernel.h>
21 #include <linux/sched.h>
22 #include <linux/timer.h>
23 #include <linux/delay.h>
25 #include <linux/ioctl.h>
26 #include <linux/blkdev.h>
27 #include <linux/interrupt.h>
28 #include <linux/smp_lock.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
32 #include <asm/dbdma.h>
34 #include <asm/uaccess.h>
35 #include <asm/mediabay.h>
36 #include <asm/machdep.h>
37 #include <asm/pmac_feature.h>
39 static struct request_queue *swim3_queue;
40 static struct gendisk *disks[2];
41 static struct request *fd_req;
43 #define MAX_FLOPPIES 2
57 #define REG(x) unsigned char x; char x ## _pad[15];
60 * The names for these registers mostly represent speculation on my part.
61 * It will be interesting to see how close they are to the names Apple uses.
65 REG(timer); /* counts down at 1MHz */
68 REG(select); /* controls CA0, CA1, CA2 and LSTRB signals */
70 REG(control); /* writing bits clears them */
71 REG(status); /* writing bits sets them in control */
73 REG(nseek); /* # tracks to seek */
74 REG(ctrack); /* current track number */
75 REG(csect); /* current sector number */
76 REG(gap3); /* size of gap 3 in track format */
77 REG(sector); /* sector # to read or write */
78 REG(nsect); /* # sectors to read or write */
82 #define control_bic control
83 #define control_bis status
85 /* Bits in select register */
89 /* Bits in control register */
93 #define WRITE_SECTORS 0x10
94 #define DO_ACTION 0x08
95 #define DRIVE2_ENABLE 0x04
96 #define DRIVE_ENABLE 0x02
97 #define INTR_ENABLE 0x01
99 /* Bits in status register */
100 #define FIFO_1BYTE 0x80
101 #define FIFO_2BYTE 0x40
105 #define INTR_PENDING 0x02
106 #define MARK_BYTE 0x01
108 /* Bits in intr and intr_enable registers */
109 #define ERROR_INTR 0x20
110 #define DATA_CHANGED 0x10
111 #define TRANSFER_DONE 0x08
112 #define SEEN_SECTOR 0x04
113 #define SEEK_DONE 0x02
114 #define TIMER_DONE 0x01
116 /* Bits in error register */
117 #define ERR_DATA_CRC 0x80
118 #define ERR_ADDR_CRC 0x40
119 #define ERR_OVERRUN 0x04
120 #define ERR_UNDERRUN 0x01
122 /* Bits in setup register */
123 #define S_SW_RESET 0x80
124 #define S_GCR_WRITE 0x40
125 #define S_IBM_DRIVE 0x20
126 #define S_TEST_MODE 0x10
127 #define S_FCLK_DIV2 0x08
129 #define S_COPY_PROT 0x02
130 #define S_INV_WDATA 0x01
132 /* Select values for swim3_action */
133 #define SEEK_POSITIVE 0
134 #define SEEK_NEGATIVE 4
143 /* Select values for swim3_select and swim3_readbit */
147 #define RELAX 3 /* also eject in progress */
148 #define READ_DATA_0 4
149 #define TWOMEG_DRIVE 5
150 #define SINGLE_SIDED 6 /* drive or diskette is 4MB type? */
151 #define DRIVE_PRESENT 7
154 #define TRACK_ZERO 10
156 #define READ_DATA_1 12
158 #define SEEK_COMPLETE 14
159 #define ONEMEG_MEDIA 15
161 /* Definitions of values used in writing and formatting */
162 #define DATA_ESCAPE 0x99
163 #define GCR_SYNC_EXC 0x3f
164 #define GCR_SYNC_CONV 0x80
165 #define GCR_FIRST_MARK 0xd5
166 #define GCR_SECOND_MARK 0xaa
167 #define GCR_ADDR_MARK "\xd5\xaa\x00"
168 #define GCR_DATA_MARK "\xd5\xaa\x0b"
169 #define GCR_SLIP_BYTE "\x27\xaa"
170 #define GCR_SELF_SYNC "\x3f\xbf\x1e\x34\x3c\x3f"
172 #define DATA_99 "\x99\x99"
173 #define MFM_ADDR_MARK "\x99\xa1\x99\xa1\x99\xa1\x99\xfe"
174 #define MFM_INDEX_MARK "\x99\xc2\x99\xc2\x99\xc2\x99\xfc"
175 #define MFM_GAP_LEN 12
177 struct floppy_state {
178 enum swim_state state;
180 struct swim3 __iomem *swim3; /* hardware registers */
181 struct dbdma_regs __iomem *dma; /* DMA controller registers */
182 int swim3_intr; /* interrupt number for SWIM3 */
183 int dma_intr; /* interrupt number for DMA channel */
184 int cur_cyl; /* cylinder head is on, or -1 */
185 int cur_sector; /* last sector we saw go past */
186 int req_cyl; /* the cylinder for the current r/w request */
187 int head; /* head number ditto */
188 int req_sector; /* sector number ditto */
189 int scount; /* # sectors we're transferring at present */
192 int secpercyl; /* disk geometry information */
195 int write_prot; /* 1 if write-protected, 0 if not, -1 dunno */
196 struct dbdma_cmd *dma_cmd;
199 struct timer_list timeout;
202 wait_queue_head_t wait;
204 struct macio_dev *mdev;
205 char dbdma_cmd_space[5 * sizeof(struct dbdma_cmd)];
208 static struct floppy_state floppy_states[MAX_FLOPPIES];
209 static int floppy_count = 0;
210 static DEFINE_SPINLOCK(swim3_lock);
212 static unsigned short write_preamble[] = {
213 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, /* gap field */
214 0, 0, 0, 0, 0, 0, /* sync field */
215 0x99a1, 0x99a1, 0x99a1, 0x99fb, /* data address mark */
216 0x990f /* no escape for 512 bytes */
219 static unsigned short write_postamble[] = {
220 0x9904, /* insert CRC */
222 0x9908, /* stop writing */
226 static void swim3_select(struct floppy_state *fs, int sel);
227 static void swim3_action(struct floppy_state *fs, int action);
228 static int swim3_readbit(struct floppy_state *fs, int bit);
229 static void do_fd_request(struct request_queue * q);
230 static void start_request(struct floppy_state *fs);
231 static void set_timeout(struct floppy_state *fs, int nticks,
232 void (*proc)(unsigned long));
233 static void scan_track(struct floppy_state *fs);
234 static void seek_track(struct floppy_state *fs, int n);
235 static void init_dma(struct dbdma_cmd *cp, int cmd, void *buf, int count);
236 static void setup_transfer(struct floppy_state *fs);
237 static void act(struct floppy_state *fs);
238 static void scan_timeout(unsigned long data);
239 static void seek_timeout(unsigned long data);
240 static void settle_timeout(unsigned long data);
241 static void xfer_timeout(unsigned long data);
242 static irqreturn_t swim3_interrupt(int irq, void *dev_id);
243 /*static void fd_dma_interrupt(int irq, void *dev_id);*/
244 static int grab_drive(struct floppy_state *fs, enum swim_state state,
246 static void release_drive(struct floppy_state *fs);
247 static int fd_eject(struct floppy_state *fs);
248 static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
249 unsigned int cmd, unsigned long param);
250 static int floppy_open(struct block_device *bdev, fmode_t mode);
251 static int floppy_release(struct gendisk *disk, fmode_t mode);
252 static int floppy_check_change(struct gendisk *disk);
253 static int floppy_revalidate(struct gendisk *disk);
255 static bool swim3_end_request(int err, unsigned int nr_bytes)
257 if (__blk_end_request(fd_req, err, nr_bytes))
264 static bool swim3_end_request_cur(int err)
266 return swim3_end_request(err, blk_rq_cur_bytes(fd_req));
269 static void swim3_select(struct floppy_state *fs, int sel)
271 struct swim3 __iomem *sw = fs->swim3;
273 out_8(&sw->select, RELAX);
275 out_8(&sw->control_bis, SELECT);
277 out_8(&sw->control_bic, SELECT);
278 out_8(&sw->select, sel & CA_MASK);
281 static void swim3_action(struct floppy_state *fs, int action)
283 struct swim3 __iomem *sw = fs->swim3;
285 swim3_select(fs, action);
287 out_8(&sw->select, sw->select | LSTRB);
289 out_8(&sw->select, sw->select & ~LSTRB);
293 static int swim3_readbit(struct floppy_state *fs, int bit)
295 struct swim3 __iomem *sw = fs->swim3;
298 swim3_select(fs, bit);
300 stat = in_8(&sw->status);
301 return (stat & DATA) == 0;
304 static void do_fd_request(struct request_queue * q)
308 for(i=0; i<floppy_count; i++) {
309 struct floppy_state *fs = &floppy_states[i];
310 if (fs->mdev->media_bay &&
311 check_media_bay(fs->mdev->media_bay) != MB_FD)
317 static void start_request(struct floppy_state *fs)
322 if (fs->state == idle && fs->wanted) {
323 fs->state = available;
327 while (fs->state == idle) {
329 fd_req = blk_fetch_request(swim3_queue);
335 printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%u buf=%p\n",
336 req->rq_disk->disk_name, req->cmd,
337 (long)blk_rq_pos(req), blk_rq_sectors(req), req->buffer);
338 printk(" errors=%d current_nr_sectors=%u\n",
339 req->errors, blk_rq_cur_sectors(req));
342 if (blk_rq_pos(req) >= fs->total_secs) {
343 swim3_end_request_cur(-EIO);
347 swim3_end_request_cur(-EIO);
351 if (rq_data_dir(req) == WRITE) {
352 if (fs->write_prot < 0)
353 fs->write_prot = swim3_readbit(fs, WRITE_PROT);
354 if (fs->write_prot) {
355 swim3_end_request_cur(-EIO);
360 /* Do not remove the cast. blk_rq_pos(req) is now a
361 * sector_t and can be 64 bits, but it will never go
362 * past 32 bits for this driver anyway, so we can
363 * safely cast it down and not have to do a 64/32
366 fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl;
367 x = ((long)blk_rq_pos(req)) % fs->secpercyl;
368 fs->head = x / fs->secpertrack;
369 fs->req_sector = x % fs->secpertrack + 1;
371 fs->state = do_transfer;
378 static void set_timeout(struct floppy_state *fs, int nticks,
379 void (*proc)(unsigned long))
383 spin_lock_irqsave(&fs->lock, flags);
384 if (fs->timeout_pending)
385 del_timer(&fs->timeout);
386 fs->timeout.expires = jiffies + nticks;
387 fs->timeout.function = proc;
388 fs->timeout.data = (unsigned long) fs;
389 add_timer(&fs->timeout);
390 fs->timeout_pending = 1;
391 spin_unlock_irqrestore(&fs->lock, flags);
394 static inline void scan_track(struct floppy_state *fs)
396 struct swim3 __iomem *sw = fs->swim3;
398 swim3_select(fs, READ_DATA_0);
399 in_8(&sw->intr); /* clear SEEN_SECTOR bit */
401 out_8(&sw->intr_enable, SEEN_SECTOR);
402 out_8(&sw->control_bis, DO_ACTION);
403 /* enable intr when track found */
404 set_timeout(fs, HZ, scan_timeout); /* enable timeout */
407 static inline void seek_track(struct floppy_state *fs, int n)
409 struct swim3 __iomem *sw = fs->swim3;
412 swim3_action(fs, SEEK_POSITIVE);
415 swim3_action(fs, SEEK_NEGATIVE);
418 fs->expect_cyl = (fs->cur_cyl >= 0)? fs->cur_cyl + n: -1;
419 swim3_select(fs, STEP);
421 /* enable intr when seek finished */
422 out_8(&sw->intr_enable, SEEK_DONE);
423 out_8(&sw->control_bis, DO_SEEK);
424 set_timeout(fs, 3*HZ, seek_timeout); /* enable timeout */
428 static inline void init_dma(struct dbdma_cmd *cp, int cmd,
429 void *buf, int count)
431 st_le16(&cp->req_count, count);
432 st_le16(&cp->command, cmd);
433 st_le32(&cp->phy_addr, virt_to_bus(buf));
437 static inline void setup_transfer(struct floppy_state *fs)
440 struct swim3 __iomem *sw = fs->swim3;
441 struct dbdma_cmd *cp = fs->dma_cmd;
442 struct dbdma_regs __iomem *dr = fs->dma;
444 if (blk_rq_cur_sectors(fd_req) <= 0) {
445 printk(KERN_ERR "swim3: transfer 0 sectors?\n");
448 if (rq_data_dir(fd_req) == WRITE)
451 n = fs->secpertrack - fs->req_sector + 1;
452 if (n > blk_rq_cur_sectors(fd_req))
453 n = blk_rq_cur_sectors(fd_req);
456 swim3_select(fs, fs->head? READ_DATA_1: READ_DATA_0);
457 out_8(&sw->sector, fs->req_sector);
458 out_8(&sw->nsect, n);
460 out_le32(&dr->cmdptr, virt_to_bus(cp));
461 if (rq_data_dir(fd_req) == WRITE) {
462 /* Set up 3 dma commands: write preamble, data, postamble */
463 init_dma(cp, OUTPUT_MORE, write_preamble, sizeof(write_preamble));
465 init_dma(cp, OUTPUT_MORE, fd_req->buffer, 512);
467 init_dma(cp, OUTPUT_LAST, write_postamble, sizeof(write_postamble));
469 init_dma(cp, INPUT_LAST, fd_req->buffer, n * 512);
472 out_le16(&cp->command, DBDMA_STOP);
473 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
475 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
476 if (rq_data_dir(fd_req) == WRITE)
477 out_8(&sw->control_bis, WRITE_SECTORS);
479 out_le32(&dr->control, (RUN << 16) | RUN);
480 /* enable intr when transfer complete */
481 out_8(&sw->intr_enable, TRANSFER_DONE);
482 out_8(&sw->control_bis, DO_ACTION);
483 set_timeout(fs, 2*HZ, xfer_timeout); /* enable timeout */
486 static void act(struct floppy_state *fs)
491 return; /* XXX shouldn't get here */
494 if (swim3_readbit(fs, TRACK_ZERO)) {
496 if (fs->req_cyl == 0)
497 fs->state = do_transfer;
506 if (fs->cur_cyl < 0) {
508 fs->state = locating;
511 if (fs->req_cyl == fs->cur_cyl) {
512 printk("whoops, seeking 0\n");
513 fs->state = do_transfer;
516 seek_track(fs, fs->req_cyl - fs->cur_cyl);
520 /* check for SEEK_COMPLETE after 30ms */
521 fs->settle_time = (HZ + 32) / 33;
522 set_timeout(fs, fs->settle_time, settle_timeout);
526 if (fs->cur_cyl != fs->req_cyl) {
527 if (fs->retries > 5) {
528 swim3_end_request_cur(-EIO);
543 printk(KERN_ERR"swim3: unknown state %d\n", fs->state);
549 static void scan_timeout(unsigned long data)
551 struct floppy_state *fs = (struct floppy_state *) data;
552 struct swim3 __iomem *sw = fs->swim3;
554 fs->timeout_pending = 0;
555 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
556 out_8(&sw->select, RELAX);
557 out_8(&sw->intr_enable, 0);
559 if (fs->retries > 5) {
560 swim3_end_request_cur(-EIO);
569 static void seek_timeout(unsigned long data)
571 struct floppy_state *fs = (struct floppy_state *) data;
572 struct swim3 __iomem *sw = fs->swim3;
574 fs->timeout_pending = 0;
575 out_8(&sw->control_bic, DO_SEEK);
576 out_8(&sw->select, RELAX);
577 out_8(&sw->intr_enable, 0);
578 printk(KERN_ERR "swim3: seek timeout\n");
579 swim3_end_request_cur(-EIO);
584 static void settle_timeout(unsigned long data)
586 struct floppy_state *fs = (struct floppy_state *) data;
587 struct swim3 __iomem *sw = fs->swim3;
589 fs->timeout_pending = 0;
590 if (swim3_readbit(fs, SEEK_COMPLETE)) {
591 out_8(&sw->select, RELAX);
592 fs->state = locating;
596 out_8(&sw->select, RELAX);
597 if (fs->settle_time < 2*HZ) {
599 set_timeout(fs, 1, settle_timeout);
602 printk(KERN_ERR "swim3: seek settle timeout\n");
603 swim3_end_request_cur(-EIO);
608 static void xfer_timeout(unsigned long data)
610 struct floppy_state *fs = (struct floppy_state *) data;
611 struct swim3 __iomem *sw = fs->swim3;
612 struct dbdma_regs __iomem *dr = fs->dma;
615 fs->timeout_pending = 0;
616 out_le32(&dr->control, RUN << 16);
617 /* We must wait a bit for dbdma to stop */
618 for (n = 0; (in_le32(&dr->status) & ACTIVE) && n < 1000; n++)
620 out_8(&sw->intr_enable, 0);
621 out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
622 out_8(&sw->select, RELAX);
623 printk(KERN_ERR "swim3: timeout %sing sector %ld\n",
624 (rq_data_dir(fd_req)==WRITE? "writ": "read"),
625 (long)blk_rq_pos(fd_req));
626 swim3_end_request_cur(-EIO);
631 static irqreturn_t swim3_interrupt(int irq, void *dev_id)
633 struct floppy_state *fs = (struct floppy_state *) dev_id;
634 struct swim3 __iomem *sw = fs->swim3;
637 struct dbdma_regs __iomem *dr;
638 struct dbdma_cmd *cp;
640 intr = in_8(&sw->intr);
641 err = (intr & ERROR_INTR)? in_8(&sw->error): 0;
642 if ((intr & ERROR_INTR) && fs->state != do_transfer)
643 printk(KERN_ERR "swim3_interrupt, state=%d, dir=%x, intr=%x, err=%x\n",
644 fs->state, rq_data_dir(fd_req), intr, err);
647 if (intr & SEEN_SECTOR) {
648 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
649 out_8(&sw->select, RELAX);
650 out_8(&sw->intr_enable, 0);
651 del_timer(&fs->timeout);
652 fs->timeout_pending = 0;
653 if (sw->ctrack == 0xff) {
654 printk(KERN_ERR "swim3: seen sector but cyl=ff?\n");
656 if (fs->retries > 5) {
657 swim3_end_request_cur(-EIO);
666 fs->cur_cyl = sw->ctrack;
667 fs->cur_sector = sw->csect;
668 if (fs->expect_cyl != -1 && fs->expect_cyl != fs->cur_cyl)
669 printk(KERN_ERR "swim3: expected cyl %d, got %d\n",
670 fs->expect_cyl, fs->cur_cyl);
671 fs->state = do_transfer;
677 if (sw->nseek == 0) {
678 out_8(&sw->control_bic, DO_SEEK);
679 out_8(&sw->select, RELAX);
680 out_8(&sw->intr_enable, 0);
681 del_timer(&fs->timeout);
682 fs->timeout_pending = 0;
683 if (fs->state == seeking)
685 fs->state = settling;
690 out_8(&sw->intr_enable, 0);
691 del_timer(&fs->timeout);
692 fs->timeout_pending = 0;
696 if ((intr & (ERROR_INTR | TRANSFER_DONE)) == 0)
698 out_8(&sw->intr_enable, 0);
699 out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
700 out_8(&sw->select, RELAX);
701 del_timer(&fs->timeout);
702 fs->timeout_pending = 0;
705 if (rq_data_dir(fd_req) == WRITE)
708 * Check that the main data transfer has finished.
709 * On writing, the swim3 sometimes doesn't use
710 * up all the bytes of the postamble, so we can still
711 * see DMA active here. That doesn't matter as long
712 * as all the sector data has been transferred.
714 if ((intr & ERROR_INTR) == 0 && cp->xfer_status == 0) {
715 /* wait a little while for DMA to complete */
716 for (n = 0; n < 100; ++n) {
717 if (cp->xfer_status != 0)
724 out_le32(&dr->control, (RUN | PAUSE) << 16);
725 stat = ld_le16(&cp->xfer_status);
726 resid = ld_le16(&cp->res_count);
727 if (intr & ERROR_INTR) {
728 n = fs->scount - 1 - resid / 512;
730 blk_update_request(fd_req, 0, n << 9);
733 if (fs->retries < 5) {
737 printk("swim3: error %sing block %ld (err=%x)\n",
738 rq_data_dir(fd_req) == WRITE? "writ": "read",
739 (long)blk_rq_pos(fd_req), err);
740 swim3_end_request_cur(-EIO);
744 if ((stat & ACTIVE) == 0 || resid != 0) {
745 /* musta been an error */
746 printk(KERN_ERR "swim3: fd dma: stat=%x resid=%d\n", stat, resid);
747 printk(KERN_ERR " state=%d, dir=%x, intr=%x, err=%x\n",
748 fs->state, rq_data_dir(fd_req), intr, err);
749 swim3_end_request_cur(-EIO);
754 if (swim3_end_request(0, fs->scount << 9)) {
755 fs->req_sector += fs->scount;
756 if (fs->req_sector > fs->secpertrack) {
757 fs->req_sector -= fs->secpertrack;
758 if (++fs->head > 1) {
767 if (fs->state == idle)
771 printk(KERN_ERR "swim3: don't know what to do in state %d\n", fs->state);
777 static void fd_dma_interrupt(int irq, void *dev_id)
782 static int grab_drive(struct floppy_state *fs, enum swim_state state,
787 spin_lock_irqsave(&fs->lock, flags);
788 if (fs->state != idle) {
790 while (fs->state != available) {
791 if (interruptible && signal_pending(current)) {
793 spin_unlock_irqrestore(&fs->lock, flags);
796 interruptible_sleep_on(&fs->wait);
801 spin_unlock_irqrestore(&fs->lock, flags);
805 static void release_drive(struct floppy_state *fs)
809 spin_lock_irqsave(&fs->lock, flags);
812 spin_unlock_irqrestore(&fs->lock, flags);
815 static int fd_eject(struct floppy_state *fs)
819 err = grab_drive(fs, ejecting, 1);
822 swim3_action(fs, EJECT);
823 for (n = 20; n > 0; --n) {
824 if (signal_pending(current)) {
828 swim3_select(fs, RELAX);
829 schedule_timeout_interruptible(1);
830 if (swim3_readbit(fs, DISK_IN) == 0)
833 swim3_select(fs, RELAX);
840 static struct floppy_struct floppy_type =
841 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL }; /* 7 1.44MB 3.5" */
843 static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode,
844 unsigned int cmd, unsigned long param)
846 struct floppy_state *fs = bdev->bd_disk->private_data;
849 if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
852 if (fs->mdev->media_bay &&
853 check_media_bay(fs->mdev->media_bay) != MB_FD)
858 if (fs->ref_count != 1)
863 if (copy_to_user((void __user *) param, &floppy_type,
864 sizeof(struct floppy_struct)))
871 static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
872 unsigned int cmd, unsigned long param)
877 ret = floppy_locked_ioctl(bdev, mode, cmd, param);
883 static int floppy_open(struct block_device *bdev, fmode_t mode)
885 struct floppy_state *fs = bdev->bd_disk->private_data;
886 struct swim3 __iomem *sw = fs->swim3;
889 if (fs->ref_count == 0) {
890 if (fs->mdev->media_bay &&
891 check_media_bay(fs->mdev->media_bay) != MB_FD)
893 out_8(&sw->setup, S_IBM_DRIVE | S_FCLK_DIV2);
894 out_8(&sw->control_bic, 0xff);
895 out_8(&sw->mode, 0x95);
897 out_8(&sw->intr_enable, 0);
898 out_8(&sw->control_bis, DRIVE_ENABLE | INTR_ENABLE);
899 swim3_action(fs, MOTOR_ON);
902 for (n = 0; n < 2 * HZ; ++n) {
903 if (n >= HZ/30 && swim3_readbit(fs, SEEK_COMPLETE))
905 if (signal_pending(current)) {
909 swim3_select(fs, RELAX);
910 schedule_timeout_interruptible(1);
912 if (err == 0 && (swim3_readbit(fs, SEEK_COMPLETE) == 0
913 || swim3_readbit(fs, DISK_IN) == 0))
915 swim3_action(fs, SETMFM);
916 swim3_select(fs, RELAX);
918 } else if (fs->ref_count == -1 || mode & FMODE_EXCL)
921 if (err == 0 && (mode & FMODE_NDELAY) == 0
922 && (mode & (FMODE_READ|FMODE_WRITE))) {
923 check_disk_change(bdev);
928 if (err == 0 && (mode & FMODE_WRITE)) {
929 if (fs->write_prot < 0)
930 fs->write_prot = swim3_readbit(fs, WRITE_PROT);
936 if (fs->ref_count == 0) {
937 swim3_action(fs, MOTOR_OFF);
938 out_8(&sw->control_bic, DRIVE_ENABLE | INTR_ENABLE);
939 swim3_select(fs, RELAX);
944 if (mode & FMODE_EXCL)
952 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
957 ret = floppy_open(bdev, mode);
963 static int floppy_release(struct gendisk *disk, fmode_t mode)
965 struct floppy_state *fs = disk->private_data;
966 struct swim3 __iomem *sw = fs->swim3;
968 if (fs->ref_count > 0 && --fs->ref_count == 0) {
969 swim3_action(fs, MOTOR_OFF);
970 out_8(&sw->control_bic, 0xff);
971 swim3_select(fs, RELAX);
977 static int floppy_check_change(struct gendisk *disk)
979 struct floppy_state *fs = disk->private_data;
983 static int floppy_revalidate(struct gendisk *disk)
985 struct floppy_state *fs = disk->private_data;
986 struct swim3 __iomem *sw;
989 if (fs->mdev->media_bay &&
990 check_media_bay(fs->mdev->media_bay) != MB_FD)
994 grab_drive(fs, revalidating, 0);
995 out_8(&sw->intr_enable, 0);
996 out_8(&sw->control_bis, DRIVE_ENABLE);
997 swim3_action(fs, MOTOR_ON); /* necessary? */
1001 for (n = HZ; n > 0; --n) {
1002 if (swim3_readbit(fs, SEEK_COMPLETE))
1004 if (signal_pending(current))
1006 swim3_select(fs, RELAX);
1007 schedule_timeout_interruptible(1);
1009 ret = swim3_readbit(fs, SEEK_COMPLETE) == 0
1010 || swim3_readbit(fs, DISK_IN) == 0;
1012 swim3_action(fs, MOTOR_OFF);
1015 swim3_action(fs, SETMFM);
1017 swim3_select(fs, RELAX);
1023 static const struct block_device_operations floppy_fops = {
1024 .open = floppy_unlocked_open,
1025 .release = floppy_release,
1026 .ioctl = floppy_ioctl,
1027 .media_changed = floppy_check_change,
1028 .revalidate_disk= floppy_revalidate,
1031 static int swim3_add_device(struct macio_dev *mdev, int index)
1033 struct device_node *swim = mdev->ofdev.dev.of_node;
1034 struct floppy_state *fs = &floppy_states[index];
1037 /* Check & Request resources */
1038 if (macio_resource_count(mdev) < 2) {
1039 printk(KERN_WARNING "ifd%d: no address for %s\n",
1040 index, swim->full_name);
1043 if (macio_irq_count(mdev) < 2) {
1044 printk(KERN_WARNING "fd%d: no intrs for device %s\n",
1045 index, swim->full_name);
1047 if (macio_request_resource(mdev, 0, "swim3 (mmio)")) {
1048 printk(KERN_ERR "fd%d: can't request mmio resource for %s\n",
1049 index, swim->full_name);
1052 if (macio_request_resource(mdev, 1, "swim3 (dma)")) {
1053 printk(KERN_ERR "fd%d: can't request dma resource for %s\n",
1054 index, swim->full_name);
1055 macio_release_resource(mdev, 0);
1058 dev_set_drvdata(&mdev->ofdev.dev, fs);
1060 if (mdev->media_bay == NULL)
1061 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1);
1063 memset(fs, 0, sizeof(*fs));
1064 spin_lock_init(&fs->lock);
1066 fs->swim3 = (struct swim3 __iomem *)
1067 ioremap(macio_resource_start(mdev, 0), 0x200);
1068 if (fs->swim3 == NULL) {
1069 printk("fd%d: couldn't map registers for %s\n",
1070 index, swim->full_name);
1074 fs->dma = (struct dbdma_regs __iomem *)
1075 ioremap(macio_resource_start(mdev, 1), 0x200);
1076 if (fs->dma == NULL) {
1077 printk("fd%d: couldn't map DMA for %s\n",
1078 index, swim->full_name);
1083 fs->swim3_intr = macio_irq(mdev, 0);
1084 fs->dma_intr = macio_irq(mdev, 1);
1086 fs->cur_sector = -1;
1088 fs->secpertrack = 18;
1089 fs->total_secs = 2880;
1091 init_waitqueue_head(&fs->wait);
1093 fs->dma_cmd = (struct dbdma_cmd *) DBDMA_ALIGN(fs->dbdma_cmd_space);
1094 memset(fs->dma_cmd, 0, 2 * sizeof(struct dbdma_cmd));
1095 st_le16(&fs->dma_cmd[1].command, DBDMA_STOP);
1097 if (request_irq(fs->swim3_intr, swim3_interrupt, 0, "SWIM3", fs)) {
1098 printk(KERN_ERR "fd%d: couldn't request irq %d for %s\n",
1099 index, fs->swim3_intr, swim->full_name);
1100 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
1105 if (request_irq(fs->dma_intr, fd_dma_interrupt, 0, "SWIM3-dma", fs)) {
1106 printk(KERN_ERR "Couldn't get irq %d for SWIM3 DMA",
1112 init_timer(&fs->timeout);
1114 printk(KERN_INFO "fd%d: SWIM3 floppy controller %s\n", floppy_count,
1115 mdev->media_bay ? "in media bay" : "");
1124 macio_release_resource(mdev, 0);
1125 macio_release_resource(mdev, 1);
1130 static int __devinit swim3_attach(struct macio_dev *mdev, const struct of_device_id *match)
1133 struct gendisk *disk;
1136 rc = swim3_add_device(mdev, floppy_count);
1140 /* Now create the queue if not there yet */
1141 if (swim3_queue == NULL) {
1142 /* If we failed, there isn't much we can do as the driver is still
1143 * too dumb to remove the device, just bail out
1145 if (register_blkdev(FLOPPY_MAJOR, "fd"))
1147 swim3_queue = blk_init_queue(do_fd_request, &swim3_lock);
1148 if (swim3_queue == NULL) {
1149 unregister_blkdev(FLOPPY_MAJOR, "fd");
1154 /* Now register that disk. Same comment about failure handling */
1156 disk = disks[i] = alloc_disk(1);
1160 disk->major = FLOPPY_MAJOR;
1161 disk->first_minor = i;
1162 disk->fops = &floppy_fops;
1163 disk->private_data = &floppy_states[i];
1164 disk->queue = swim3_queue;
1165 disk->flags |= GENHD_FL_REMOVABLE;
1166 sprintf(disk->disk_name, "fd%d", i);
1167 set_capacity(disk, 2880);
1173 static struct of_device_id swim3_match[] =
1179 .compatible = "ohare-swim3"
1182 .compatible = "swim3"
1186 static struct macio_driver swim3_driver =
1190 .of_match_table = swim3_match,
1192 .probe = swim3_attach,
1194 .suspend = swim3_suspend,
1195 .resume = swim3_resume,
1200 int swim3_init(void)
1202 macio_register_driver(&swim3_driver);
1206 module_init(swim3_init)
1208 MODULE_LICENSE("GPL");
1209 MODULE_AUTHOR("Paul Mackerras");
1210 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);